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Complete noob right here, I'm learning c++ and I saw some tutorial somewhere with instructions to compile the Qt application example from the command line, then I noticed the path from the tutorial was not correct, I want to learn how to compile Qt from command line, and maybe even do some makefiles to automate the process, at least I want to get started ...It seems like the qt libraries are already installed within my system since it is using the KDE desktop environment, but I don't know how should I link or what paths should I include as arguments. Please guide me, remember I'm a complety noob but I really want to learn.
This is the tutorial I'm talking about http://zetcode.com/gui/qt5/introduction/
When you build, Qt Creator does three things only: it invokes qmake, then make, then runs the target. That's all.
Suppose your project is in ~/src/project. Here's how you would build it properly using a shadow build folder:
$ mkdir -p ~/src/project-build
$ cd ~/src/project-build
$ qmake ~/src/project
$ make -j
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I was programming in C++ a small program using QMultiMedia and QAudioOutput.
I compile and run my program in Qt (6.4) without error however when I run my program in File Explorer, when all DLLs are present, I get this error:
'could not load multimedia backend'"
QtMultimedia is not currently supported on this platform or compiler.'
So I started my research and I found several solutions however I did not understand their explanations very well (I start ...).
Here are the links I found:
-> Qt forum
-> Bugreports
-> CSDN
I tried to copy all the DLLs in mingw/bin in my folder or there is my .exe, I also copied the multimedia plugin (from mingw/plugins) to my folder or there is my .exe.
I'm on Windows 10 22h2.
Could you give me a clearer explanation? I would be very grateful.
Kind regards
Albin
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I am looking to learn a new language, C++, but I experience some difficulties with Code::Blocks 20.03 (CB). I am currently running CB on my DELL XPS 13-9360 with Linux, Ubuntu 20.04.1 LTS. I installed CB with the instructions on this site: http://ubuntuhandbook.org/index.php/2020/03/install-codeblocks-20-03-ubuntu-18-04/ using sudo apt install codeblocks codeblocks-contrib.
Now, I create a new project on CB, keeping the default options (with GNU GCC Compiler), but when I try to build the main.cpp file (hello world), there is this error message:
obj/Debug/main.o: no such file or directory
error: no input files.
You can also see the properties of my project for Debug and advanced options:
Build
Advanced
Here is my installed packages list (got it with dpkg --list | grep c++):
Packages_list
Thanks already for any help you could bring me, and let me know if there is some missing information that you need to help me.
L.R.
I'm afraid you were bitten by this code::blocks bug, which seems to have been plaguing Code::Blocks for a while now:
#993 Will not compile sources on build if path contains international characters
You can try renaming your homework directory from "École" to "Ecole" to see if that fixes it.
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So I've attempted to install the aircrack-ng library on my Mac. I've followed the instructions outlined by the aircrack-ng docs and by the README file on the Github repository. When I run,
aircrack-ng --help
I get the list of options, etc... like I should. But when I run,
airmon-ng
I get
zsh: command not found: airmon-ng
I've run both commands as root and in the aircrack-ng directory. I've tried installing both the stable version linked by the aircrack-ng docs and the version directly from Github. Other commands like airebase-ng and aircrack-ng work (at least they result in output), but for some reason airmon-ng doesn't. Also, inside the aircrack-ng directory, I found scripts named "aircrack-ng", "airbase-ing", etc... but there weren't any files named "airmon-ng." The commands I used in the setup were:
git clone https://github.com/aircrack-ng/aircrack-ng
cd aircrack-ng
autoreconf -i
./configure --with-experimental
I tried it once with
make
make install
and then repeated the whole process again and tried using
gmake
and both times I get the same error. I'm incredibly confused why airmon-ng appears to be missing. Any help is appreciated :) Thanks.
My bad, I finally found the answer in a similar StackOverflow question that actually got recommended to me since I asked this question.
The reality is that there is no airmon-ng command on the MacOS installation; I was looking for something that didn't exist. On MacOS, there's an alternative command called airport (that's built into the OS) that you can use instead.
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I ran cmake and make on Box2D with success but when I try to run the Testbed the text below is displayed in the terminal but nothing else happens.
freeglut (./Testbed):
And after this I get back the prompt. Looks like OpenGL/freeglut is not working properly because the HelloWorld is working.
The system is ubuntu 12.04
The solution was super simple, but I needed a sleep to solve it. I reinstalled the graphics driver and it works.
I logged out and logged in again, the problem is gone.
I am using Mac. Actually I installed XQuartz to solve the problem
'GL/gl.h' file not found
and then running the built binary give me the error
freeglut (./Testbed): failed to open display ''
Then I remember after installing XQuartz, there's message asking me to log out to make it take effect. And after I logging back, the built binary can run.
:)
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I'm attempting to get Qt setup to run a simple hello world example, but I can't get the compilation setup right for the IDE (QtCreator). When I attempt to build by pressing the build button, I am getting the following error message:
Qt creator needs a compiler setup to build. Configure a compiler in the kit options
So I noticed that I had nothing setup for the compiler. I then downloaded a MinGW compiler and it seems the IDE managed to recognize it automatically. Still, when I attempt to build I am getting the same error message.
The truth is that I really don't know the process of compilation either from the command line or in other IDEs. I've read that there might be an issue with paths? I'm running on Windows. I would be extremely grateful if someone could explain what I may be doing wrong and what issue I may be having with building in QtCreator.
You will need to do the following steps for QtCreator:
1) Go to Settings > Build and Run > Kits.
2) Check if the auto-detection is correct. It is probably not if you have issues, so you will need to either set up manually or rreinstall QtCreator to see if the problem goes away. If it is not detected, you will have a read exclamation mark.
3) Add a new Kit.
4) Type a name.
5) You need to choose the proper "Qt version".
6) You need to choose the compiler.
7) Select the "Make Default" option.
As for command line, you should be able to do something like this to build a simple dummy main.cpp:
main.cpp
int main() {}
and then you can run the following commands in the (msys/cygwin/etc) prompt:
qmake -project && qmake && make